| Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt／CHT |
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| 引用本文： | WANG Zhen-lü.Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt／CHT[J].高等学校化学研究,2005,21(1):83-87. |
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| 作者姓名： | WANG Zhen-lü |
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| 作者单位： | YANG Piao-ping，WANG Zhen-lü，YU Jian-feng，LIU Qing-sheng，XUE Bin ZHANG Zuo-wang and WU Tong-hao* College of Chemistry，Jilin University，Changchun 130023，P. R. China |
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| 摘 要： | Mg/Al mixed oxides with molar ratios of 2-6 of Mg to Al used as supports for platinum catalysts were obtained by the thermal decomposition method. The effect of the composition of the mixed oxides on the physicochemical properties was studied by TPD, nitrogen sorption, XRD and TG-DTA characterization methods. The synthesis of o-phenylphenol (OPP) from a dimer (obtained from cyclohexanone condensation) was investigated over Pt/CHT catalysts and compared with those over Pt/MgO and Pt/Al2O3 catalysts. These catalysts show a high activity and selectivity for OPP, with a conversion reaching 93.8% and a selectivity reaching 87.9% in some experiments. For Pt/CHTx catalysts, the calcined hydrotalcites exhibited strong base sites, which were necessary to catalyze the synthesis of OPP.
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| 关 键 词： | 制备 表征 水滑石 催化性质 o-苯基苯酚 Pt／MgO Pt／Al2O3 催化剂 Mg／Al比率 CHT OPP |
Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt/CHT |
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| YANG Piao-ping,YU Jian-feng,LIU Qing-sheng,XUE Bin,ZHANG Zuo-wang,WU Tong-hao.Preparation, Characterization of Hydrotalcites and the Catalytic Properties in Synthesis of o-Phenylphenol over Pt/CHT[J].Chemical Research in Chinese University,2005,21(1):83-87. |
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| Authors: | YANG Piao-ping YU Jian-feng LIU Qing-sheng XUE Bin ZHANG Zuo-wang WU Tong-hao |
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| Abstract: | Mg/Al mixed oxides with molar ratios of 2_6 of Mg to Al used as supports for platinum catalysts were obtained by the thermal decomposition method. The effect of the composition of the mixed oxides on the physicochemical properties was studied by TPD, nitrogen sorption, XRD and TG-DTA characterization methods. The synthesis of o-phenylphenol(OPP) from a dimer(obtained from cyclohexanone condensation) was investigated over Pt/CHT catalysts and compared with those over Pt/MgO and Pt/Al2O3 catalysts. These catalysts show a high activity and selectivity for OPP, with a conversion reaching 93.8% and a selectivity reaching 87.9% in some experiments. For Pt/CHTx catalysts, the calcined hydrotalcites exhibited strong base sites, which were necessary to catalyze the synthesis of OPP. |
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| Keywords: | Hydrotalcite CHT OPP Dimer dehydrogenation n(Mg)/n(Al) ratio |
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